Retraction mechanism for medical device
US11266439B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2019 |
| Grant date | Mar 8, 2022 |
| Priority date | — |
| Expiry date | May 21, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/320028
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device comprises a retractable shaft; a shaft biasing spring; and an actuator button. The retractable shaft is biased away from the actuator button by the shaft biasing spring. A magnetic attracting force is created between the retractable shaft and the actuator button upon actuation of the actuator button. Before actuation, a distance between the actuator button and the retractable shaft is great enough that the magnetic attracting force is less than a biasing force of the shaft biasing spring such that the retractable shaft is biased away from the actuator button. Upon actuation, the actuator button is depressed to make the distance between the actuator button and the retractable shaft sufficiently small such that the magnetic attracting force is greater than the biasing force of the shaft biasing spring to allow the retractable shaft to be biased towards the actuator button.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.